Inventor
IKEDO GAKU
JP26 patents
⚠️ This page may combine multiple inventors who share the name “IKEDO GAKU”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
WESTERN DIGITAL TECH INC
16 patentsUS10176840B1Jan 8, 2019
Data storage device adjusting spindle motor current based on continuous function of voice coil current during seek
WESTERN DIGITAL TECH INC9 citations84
US10635158B1Apr 28, 2020
Write data protection at emergency power off
WESTERN DIGITAL TECH INC5 citations80
US11823710B2Nov 21, 2023
Dual spindle motors and dual spindle motor control for data storage
WESTERN DIGITAL TECH INC2 citations73
US11763844B1Sep 19, 2023
Data storage device having dual actuators and method for emergency power off retract (EPOR) of dual actuators
WESTERN DIGITAL TECH INC2 citations73
US11763843B1Sep 19, 2023
VCM PWM to linear mode transition offset optimization to improve PES
WESTERN DIGITAL TECH INC3 citations73
US11749303B2Sep 5, 2023
Data storage device with soft on-disk activation of fine actuators
WESTERN DIGITAL TECH INC2 citations73
US10996740B2May 4, 2021
Write data protection at emergency power off
WESTERN DIGITAL TECH INC2 citations69
US12266385B2Apr 1, 2025
Data storage device having dual actuators and method for emergency power off retract (EPOR) of dual actuators
WESTERN DIGITAL TECH INC0 citations62
US12254909B2Mar 18, 2025
VCM PWM to linear mode transition offset optimization to improve PES
WESTERN DIGITAL TECH INC0 citations62
US11978482B2May 7, 2024
Data storage device with closed loop extended park mode during spin down operation
WESTERN DIGITAL TECH INC0 citations62
US11862202B2Jan 2, 2024
Data storage device with smart ISOFET threshold voltage automatic tuning
WESTERN DIGITAL TECH INC0 citations62
US11373678B2Jun 28, 2022
Data storage device using windowed delta-sigma analog-to-digital converter in digital current control loop
WESTERN DIGITAL TECH INC0 citations62
US11837264B2Dec 5, 2023
Data storage device having dual actuators and method for data egress throttling during emergency power off retract (EPOR)
WESTERN DIGITAL TECH INC0 citations52
US11043243B2Jun 22, 2021
Calibrating elevator actuator for disk drive
WESTERN DIGITAL TECH INC0 citations52
US12406697B1Sep 2, 2025
Voltage slew control of fine actuators during discharge
WESTERN DIGITAL TECH INC0 citations51
US11948603B1Apr 2, 2024
Optimize power, RTV, and coupled PES during seek operations
WESTERN DIGITAL TECH INC0 citations50
HITACHI GLOBAL STORAGE TECH
8 patentsUS7561365B2Jul 14, 2009
Disk drive and control method thereof
HITACHI GLOBAL STORAGE TECH27 citations92
US7580217B2Aug 25, 2009
Disk drive with hybrid analog-digital acceleration feedforward control system and method for rejecting rotational vibration
HITACHI GLOBAL STORAGE TECH9 citations79
US7706099B2Apr 27, 2010
Magnetic disk drive and method of controlling the same
HITACHI GLOBAL STORAGE TECH7 citations74
US6961202B2Nov 1, 2005
Data storage device having acceleration sensor attached to circuit board for detecting vibrations in planar rotation direction along circuit board
HITACHI GLOBAL STORAGE TECH9 citations72
US7253581B2Aug 7, 2007
Data storage device, motor control device, and motor control method
HITACHI GLOBAL STORAGE TECH7 citations68
US7576936B2Aug 18, 2009
Method of starting the magnetic disk device using fluid dynamic bearing spindle motor
HITACHI GLOBAL STORAGE TECH1 citations49
US7133236B2Nov 7, 2006
Storage device control method, motor control method, and storage device
HITACHI GLOBAL STORAGE TECH1 citations49
US7474490B2Jan 6, 2009
Disk drive with reduced vibration due to rotational acceleration of a spindle motor
HITACHI GLOBAL STORAGE TECH0 citations47